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In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 1.8 x 106. One pulse is delivered every time the fully charged capacitor loses 60.5% of its original charge. What is the capacitance of the capacitor?
An oscillator consists of a block of mass 0.800 kg connected to a spring. When set into oscillation with amplitude 34.0 cm, it is observed to repeat its motion every 1.000 s. Find the maximum force exerted on the block
A flywheel rotates with an angular speed of 22 rev/s . As it is brought to rest with a constant acceleration, it turns 46 rev. What is the magnitude of the angular acceleration
Direction of the surface winds What is the expected composition
An object of mass M = 3.5 kg slides from rest a distance d = 6 m down a frictionless inclined plane where it encounters a spring. When the block just touches the spring, how much gravitational potential energy has it lost
A 5.0 µC point charge is placed in an external uniform electric field of 2.00 104 N/C. At what distance from the charge is the net electric field zero
A uniform disk with a mass of 875 g and radius 17.0 cm is rotating on frictionless bearings with an rotational speed of 18.0 Hz, What is the new rotational speed of the disk
A short time later, all of the charge has left the capacitor and the current flowing through the inductor has reached its maximum value. What is this current
A sinusoidal electromagnetic wave from a radio station passes perpendicularly through an open window that has area 0.300 m2. At the window, How much energy does this wave carry through the window
A potter's wheel, with rotational inertia 6.50 , is spinning freely at 16.0 . What is the subsequent angular speed of the wheel
The athlete shown in the figure rotates a 1.00 kg discus along a circular path of radius 1.05 m. Determine the magnitude of the maximum radial acceleration of the discus
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the amount the spring compresses
A capacitor has a capacitance of 250 nF and a voltage is placed across it which grows as a function of time as: V(t) = 240 mV/s3 × t3
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